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423 - Chemistry of inorganic compounds

423414000 - CARBON OR COMPOUND THEREOF

423445000 - Elemental carbon

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DocumentTitleDate
20090214411METHOD OF SELECTIVELY ELIMINATING METALLIC CARBON NANOTUBES, SEMICONDUCTING CARBON NANOTUBES AND PREPARATION METHOD THEREOF USING THE SAME - Metallic carbon nanotubes (“CNTs”) may be selectively eliminated and semiconducting CNTs may be prepared using light-irradiation. The light provided by the light-irradiation may have a wavelength of about 180 nm to about 11 μm. Further, the light may have an intensity of about 30 mW/cm08-27-2009
20100047153METHOD OF MANUFACTURING CARBON FIBRES - The present invention relates to a method of manufacturing carbon fibres from raw materials of renewable origin, comprising: 02-25-2010
20100119436PURIFICATION METHOD FOR CARBON MATERIAL CONTAINING CARBON NANOTUBES, CARBON MATERIAL PRODUCED BY THE SAME METHOD, AND RESIN MOLDING, FIBER, HEAT SINK, SLIDER, MATERIAL FOR FIELD ELECTRON EMISSION SOURCE, CONDUCTION AID FOR ELECTRODE, CATALYST SUPPORT...... - A purification method for a carbon material containing carbon nanotubes is provided, which satisfies the following requirements: The method should prevent carbon nanotubes from being damaged, broken or flocculated; the method should be capable of removing the catalyst metal and carbon components other than the carbon nanotubes; and the method should be applicable to not only multi-walled carbon nanotubes but also single-walled carbon nanotubes which will undergo significant structural changes when heated to 1400° C. or higher temperatures. The method is characterized by including a carbon material preparation process for preparing a carbon material containing carbon nanotubes by an arc discharge method, using an anode made of a material containing at least carbon and a catalyst metal; and a halogen treatment process for bringing the carbon material into contact with a gas containing a halogen and/or halogen compound.05-13-2010
20100119435Processes for growing carbon nanotubes in the absence of catalysts - Processes for increasing the production rate of single-wall carbon nanotubes using a disordered carbon target are disclosed. The processes use a disordered carbon target and include vaporization of the target in the presence of a non-oxidizing gas. The single-wall nanotubes produced can be incorporated into electronic devices such as diodes and transistors.05-13-2010
20100074833Catalyst Body For Production of Brush-Shaped Carbon Nanostructure, Process for Producing Catalyst Body, Brush-Shaped Carbon Nanostructure, and Process for Producing the Same - It is intended to highly efficiently produce a high-density brush-shaped carbon nanostructure useful in the production of CNT assembly, such as rope-shaped CNTs, and provide a catalyst body for production of brush-shaped carbon nanostructure that enables the production. The catalyst body for production of brush-shaped carbon nanostructure is one comprising a substrate (03-25-2010
20130039839PRODUCTION OF CARBON NANOTUBES - The invention relates to a novel process for the production of catalysts for the production of carbon nanotubes in agglomerated form, which are characterised by a low bulk density. This invention likewise provides the catalysts, their use in the production of carbon nanotubes in high catalyst-specific yields, and the carbon nanotubes produced by this process.02-14-2013
20100040529ENHANCED CARBON NANOTUBE - Techniques for manufacturing an enhanced carbon nanotube (CNT) assembly are provided. In one embodiment, a method of manufacturing an enhanced CNT assembly comprises preparing a metal tip, preparing a CNT plus transition-metal colloidal solution, forming a CNT plus transition-metal composite assembly by using the prepared metal tip and CNT plus transition-metal colloidal solution, and growing the CNT plus transition-metal composite assembly.02-18-2010
20100143234METHODS OF PREPARING AND PURIFYING CARBON NANOTUBES, CARBON NANOTUBES, AND AN ELEMENT USING THE SAME - A method of preparing carbon nanotubes (CNT), a method of purifying carbon nanotubes, carbon nanotubes, and an element using said carbon nanotubes are provided. The method includes preparing carbon nanotubes by arc-discharge and employs a coordination chemistry process to remove a catalyst and/or optional promoter used in arc-discharge.06-10-2010
20130028829SYSTEM AND METHOD FOR GROWTH OF ENHANCED ADHESION CARBON NANOTUBES ON SUBSTRATES - Disclosed herein is a method of growth of enhanced adhesion MWCNTs on a substrate, referred to as the HGTiE process, the method comprising: chemical vapor deposition of an adhesive underlayer composed of alumina on a substrate composed of titanium or similar; chemical vapor deposition of a catalyst such as a thin film of iron on top of the adhesive underlayer; pretreatment of the substrate to hydrogen at high temperature; and exposure of the substrate to a feedstock gas such as ethylene at high temperature. The substrate surface may be roughened before placement of an adhesive layer through mechanical grinding or chemical etching. Finally, plasma etching of the MWCNT film may be performed with oxygen plasma. This method of growth allows for high strength adhesion of MWCNTs to the substrate the MWCNTs are grown upon.01-31-2013
20130052120METHOD FOR SEPARATING AND COLLECTING CARBON NANOTUBE, AND CARBON NANOTUBE - Metallic CNTs and semiconducting CNTs are efficiently separated from a CNT mixture of these CNTs, and semiconducting CNTs are separated by structure by using a method that enables separation in high yield in a short time period while conveniently enabling mass processing and automatic processing with inexpensive equipment.02-28-2013
20100003186CARBON FIBER - According to the present invention, there is disclosed a carbon fiber having a strand tensile strength of 6,100 MPa or more, a strand tensile modulus of 340 GPa or more and a density of 1.76 g/cm01-07-2010
20090232724METHOD OF SEPARATING METALLIC AND SEMICONDUCTING CARBON NANOTUBES FROM A MIXTURE OF SAME - A method which permits large-scale separation of a semiconducting carbon nanotube from a mixture of metallic and semiconducting carbon nanotubes based on differences in solubility resulting from preferentially reacting the metallic carbon nanotubes with an acid functional aryldiazonium salt to form a substantially fully functionalized metallic nanotubes which can be easily separated from the unfunctionalized semiconducting carbon nanotubes.09-17-2009
20130164207COMPOSITE RAW MATERIAL, CARBON FIBER MATERIAL AND METHOD FOR FORMING THE SAME - In one embodiment of the disclosure, a composite raw material and a method for forming the same are provided. The method includes sulfonating a polycyclic aromatic compound to form a polycyclic aromatic carbon sulfonate (PCAS); and mixing the polycyclic aromatic carbon sulfonate and a polyacrylonitrile (PAN) to form a composite raw material. In another embodiment of the disclosure, a carbon fiber containing the composite raw material described above and a method for forming the same are provided.06-27-2013
20110027163Hollow nanofibers-containing composition - A method for preparing hollow nanofibers having carbon as a primary component by contacting a carbon-containing compound with a catalyst at 500 to 1200° C., wherein the catalyst is one of a zeolite exhibiting thermal resistance at 900° C. and, supported thereon, a metal; a metallosilicate zeolite containing a heteroatom except aluminum and silicon and a metal; a supporting material and fine cobalt particles exhibiting a binding energy of a cobalt 2P3/2 electron of 779.3 to 781.0 eV; a supporting material and fine cobalt particles exhibiting a cobalt atom ratio in the surface of the supporting material of 0.1 to 1.5%, as measured by the X-ray photoelectron spectroscopy at 10 kV and 18 mA; a supporting material and fine cobalt particles exhibiting a weight ratio of cobalt to a second metal component of 2.5 or more; and a zeolite having a film form and a metal.02-03-2011
20110280793CARBON NANOTUBE FIBERS/FILAMENTS FORMULATED FROM METAL NANOPARTICLE CATALYST AND CARBON SOURCE - Disclosed is a method of: providing a mixture of a polymer or a resin and a transition metal compound, producing a fiber from the mixture, and heating the fiber under conditions effective to form a carbon nanotube-containing carbonaceous fiber. The polymer or resin is an aromatic polymer or a precursor thereof and the mixture is a neat mixture or is combined with a solvent. Also disclosed are a carbonaceous fiber or carbonaceous nanofiber sheet having at least 15 wt. % carbon nanotubes, a fiber or nanofiber sheet having the a polymer or a resin and the transition metal compound, and a fiber or nanofiber sheet having an aromatic polymer and metal nanoparticles.11-17-2011
20110280792CARBON NANOMATERIALS PRODUCED FROM HEAVY OIL FRACTIONS AND METHOD FOR PRODUCING SAME - The present invention relates to a method for producing carbon nanoparticles from heavy petroleum fractions as the carbon source (precursor), particularly aromatic oil residue (RARO) by chemical vapor deposition (CVD), and optionally by using an organometallic catalyst that is soluble in the precursor. The main feature of the method according to the invention is that the precursor is evaporated in a controlled manner so as to provide a pulse supply of precursor having a constant composition to the inside of a tubular furnace which can be arranged in a vertical position for the continuous production of nanomaterials or in a horizontal position for batch production.11-17-2011
20090220408METHOD OF CUTTING CARBON NANOTUBES AND CARBON NANOTUBES PREPARED BY THE SAME - A method of cutting carbon nanotubes and carbon nanotubes prepared by the same are disclosed. The cutting method includes preparing a π-stacking complex including a doping metal, a non-polar molecule, and a bipolar solvent, adding carbon nanotubes to the π-stacking complex, followed by stirring at room temperature to prepare a metal-doped carbon nanotube solution, washing and drying the metal-doped carbon nanotube solution to prepare a metal-doped carbon nanotube powder, and performing nitric acid treatment to the metal-doped carbon nanotube powder, followed by cutting and washing with distilled water. Carbon nanotubes having a short and uniform length and open terminals can be produced in mass via a simple process, thereby expanding the uses and applications of carbon nanotubes.09-03-2009
20110262341PROCESS FOR PREPARATION OF CARBON NANOTUBES FROM VEIN GRAPHITE - A catalyst free process for manufacturing carbon nanotubes by inducing an arc discharge from a carbon anode and a carbon cathode in an inert gas atmosphere contained in a closed vessel. The process is carried out at atmospheric pressure in the absence of external cooling mechanism for the carbon cathode or the carbon anode.10-27-2011
20100086471Mixed structures of single walled and multi walled carbon nanotubes - The invention relates to carbon nanotube structures containing both single walled and multi walled carbon nanotubes, and methods for preparing same. These carbon nanotube structures include but are not limited to macroscopic two and three dimensional structures of carbon nanotubes such as assemblages, mats, plugs, networks, rigid porous structures, extrudates, etc. The carbon nanotube structures of the present invention have a variety of uses, including but not limited to, porous media for filtration, adsorption, chromatography; electrodes and current collectors for supercapacitors, batteries and fuel cells; catalyst supports, (including electrocatalysis), etc.04-08-2010
20100086470Rapid microwave process for purification of nanocarbon preparations - A novel microwave-assisted process is described for the rapid removal of catalytic metal and non-desirable carbon impurities in fullerene, single wall, and multiple wall carbon nanotube preparations. The purification process is carried out at various programmed pressures, power levels and reaction times in a suspension of the nanocarbon moieties in the presence of strong acids (for example, a mixture of sulfuric acid and nitric acid), in weak acids (for example, acetic acid) and in the presence of chelating agents (for example, EDTA—ethylenediaminetetraacetic acid). In one embodiment, high metal removal efficiency of 70 to 90% is observed.04-08-2010
20100080748CONTINUOUS METHOD AND APPARATUS OF PURIFYING CARBON NANOTUBES - Provided is a continuous method and apparatus of purifying carbon nanotubes. The continuous method and apparatus of purifying carbon nanotubes is characterized in a first purifying step for injecting a carbon nanotube liquid mixture containing an oxidizer into a purifying reactor under a sub-critical water or supercritical water condition at a pressure of 50 to 400 atm and a temperature of 100 to 600° C. to obtain a purified product, thereby removing amorphous carbon and producing the carbon nanotube product.04-01-2010
20120107221METHOD FOR THE SYNTHESIS OF CARBON NANOTUBES ON LONG PARTICULATE MICROMETRIC MATERIALS - The invention relates to a method for the synthesis of carbon nanotubes on the surface of a material. The invention more particularly relates to a method for the synthesis of carbon nanotubes (or CNT) at the surface of a material using a carbon source comprising acetylene and xylene, and a catalyst containing ferrocene. The method of the invention has the advantage, amongst others, of enabling the continuous synthesis of nanotubes when desired. Also, the method of the invention is carried out at temperatures lower than those of known methods and on materials on which the growth of carbon nanotubes is difficulty reproducible and/or difficulty homogenous in terms of CNT diameter and density (number of CNT per surface unit). Said advantages, amongst others, make the method of the invention particularly useful at the industrial level. The invention also relates to materials that can be obtained by said method and to the use thereof in all the known application fields of carbon nantubes, in particular as a reinforcement for preparing structural and functional composite materials.05-03-2012
20090047207CATALYTIC ETCHING OF CARBON FIBERS - The present invention relates to a method for etching carbon fibers, in particular carbon nanofibers and to the carbon nanofibres obtainable by this method, and the use thereof.02-19-2009
20110171111BENT CARBON NANOTUBES AND METHODS OF PRODUCTION - A method of producing carbon nanotubes includes directing a flow of a gas over a substrate to provide growth of at least one carbon nanotube in a carbon-nanotube-growth region of the substrate; applying an electric field to the carbon-nanotube-growth region of the substrate after the at least one carbon nanotube has begun to grow in the carbon-nanotube-growth region, the electric field being substantially in a first direction in the carbon-nanotube-growth region; and changing the electric field at a preselected time to be substantially in a second direction in the carbon-nanotube-growth region during growth of the at least one carbon nanotube. The second direction is different from the first direction resulting in a bend substantially at a selected position of the at least one carbon nanotube, the method of producing carbon nanotubes providing the production of the at least one carbon nanotube having at least one bend substantially at a selected position along the at least one carbon nanotube.07-14-2011
20110171110MICROWAVE-ASSISTED SYNTHESIS OF CARBON NANOTUBES FROM TANNIN, LIGNIN, AND DERIVATIVES - A method of synthesizing carbon nanotubes. In one embodiment, the method includes the steps of: (a) dissolving a first amount of a first transition-metal salt and a second amount of a second transition-metal salt in water to form a solution; (b) adding a third amount of tannin to the solution to form a mixture; (c) heating the mixture to a first temperature for a first duration of time to form a sample; and (d) subjecting the sample to a microwave radiation for a second duration of time effective to produce a plurality of carbon nanotubes.07-14-2011
20090285746METHOD FOR TREATING CARBON NANOTUBES, CARBON NANOTUBES AND CARBON NANOTUBES DEVICE COMPRISING THEREOF - An efficient and cost-effective method for treating carbon nanotubes (CNTs) is provided. The method includes comprising: dispersing said carbon nanotubes in a dispersing medium to prepare a dispersion system; mixing said dispersion system with adsorbent so that type-specific carbon nanotubes contained in said dispersion system are absorbed onto the adsorbent, wherein the adsorbent is modified by a chemical/biological modifier so as to have different adsorption selectivity to carbon nanotubes of different types; and separating the adsorbent from the dispersion system, whereby the type-specific carbon nanotubes adsorbed onto the adsorbent is separated from the carbon nanotubes of another type enriched in the dispersion system; carbon nanotubes produced by the treatment method, and CNTs devices comprising thereof.11-19-2009
20090291042Continuous Method for Producing Inorganic Nanotubes - Production of nanotubes of carbon or of other inorganic material by moving a carbon-containing substrate, such as a tape or belt of carbon fibres, within a reaction chamber either though an electric arc in a gap between two electrodes or adjacent an electrode so that an electric arc exists between the electrode and the substrate, to cause the nanotubes to form on the substrate. The method enables the continuous or semi-continuous production of nanotubes. Preferably, the process is carried out at atmospheric pressure and nanotubes of high purity are produced.11-26-2009
20100202958POROUS FILAMENTOUS NANOCARBON AND METHOD OF FORMING THE SAME - A method for forming a porous filamentous nanocarbon involves radially forming a tunnel-like mesopore from an outer periphery toward the central axis of a filamentous nano carbon by attaching a material having a metal catalyst on an outer periphery of the filamentous nanocarbon and removing a carbon hexagonal plane through gasification in virtue of the metal catalyst.08-12-2010
20100202957ACTIVATED CARBON FIBERS AND ENGINEERED FORMS FROM RENEWABLE RESOURCES - A method of producing activated carbon fibers (ACFs) includes the steps of providing a natural carbonaceous precursor fiber material, blending the carbonaceous precursor material with a chemical activation agent to form chemical agent-impregnated precursor fibers, spinning the chemical agent-impregnated precursor material into fibers, and thermally treating the chemical agent-impregnated precursor fibers. The carbonaceous precursor material is both carbonized and activated to form ACFs in a single step. The method produces ACFs exclusive of a step to isolate an intermediate carbon fiber.08-12-2010
20080292531ELECTRICAL CURRENT-INDUCED STRUCTURAL CHANGES AND CHEMICAL FUNCTIONALIZATION OF CARBON NANOTUBES - A method of cutting, thinning, welding and chemically functionalizing multiwalled carbon nanotubes (CNTs) with carboxyl and allyl moieties, and altering the electrical properties of the CNT films by applying high current densities combined with air-exposure is developed and demonstrated. Such welded high-conductance CNT networks of functionalized CNTs could be useful for device and sensor applications, and may serve as high mechanical toughness mat fillers that are amenable to integration with nanocomposite matrices.11-27-2008
20090285745Method for Production of Carbon Nanotube and Method for Purification of the Same - The present invention provides a method for producing a carbon nanotube having a high purity and a method for purifying an unpurified carbon nanotube or a carbon nanotube having a low purity. The method for producing a carbon nanotube comprises a step of providing a carbonaceous material containing a carbon nanotube and a step of adding an iron material and hydrogen peroxide to the carbonaceous material to thereby purity a carbon nanotube. It is preferred that an iron powder is used as the iron material. The iron powder is preferably used in a proportion of 0.5 to 20 parts by mass relative to 100 parts by mass of the whole carbonaceous material.11-19-2009
20080317660Nanotube Structures, Materials, and Methods - Nanotube structures and methods for forming nanotube structures are disclosed. The methods include forming nanotubes such that they are associated with a surface of a substrate and compressing at least a portion of the nanotubes. In some embodiments, the nanotubes may be dimensionally constrained in one direction while being compressed in another direction. Compressing at least a portion of the nanotubes may comprise stamping an impression into a surface of the nanotubes, at least a portion of which is retained when the stamp is removed. In some embodiments, the nanotubes may be aligned with respect to one another and to the surface of the substrate and may extend in a direction that is, for example, normal to the substrate.12-25-2008
20110223094METHOD FOR SYNTHESIS OF HIGH QUALITY GRAPHENE - A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 1009-15-2011
20090004095Porous Filamentous Nanocarbon And Method Of Forming The Same - There is provided a porous filamentous nanocarbon and a method for forming the same. A mesopore formed on an outer periphery of the porous filamentous nanocarbon is a tunnel-like pore which is formed along the arrangement direction of the carbon hexagonal plane from the outer periphery toward a fiber axis. The porous filamentous nanocarbon is fabricated by selectively removing the carbon hexagonal plane constituting the filamentous nanocarbon through gasification in virtue of a catalyst, after highly dispersing Fe, Ni, Co, Pt, etc., of which size is 2-30 nm, on the surface of the filamentous nanocarbon. That is, the tunnel-like mesopore is formed radially by nano-drilling process. The size of the porous filamentous nanocarbon can be controlled according to the size of the nano-drilling catalyst and non-drilling conditions.01-01-2009
20100260658METHOD OF PRODUCING PRE-OXIDATION FIBER AND CARBON FIBER - There is disclosed a method of producing a pre-oxidation fiber in the production of the pre-oxidation fiber by subjecting a polyacrylic precursor fiber to pre-oxidation processing in an oxidizing atmosphere, including shrinking the precursor fiber as a pretreatment of pre-oxidation at a load of 0.58 g/tex or less in the temperature range of 220 to 260° C. under conditions in which the degree of cyclization (I10-14-2010
20100189628METHOD FOR DISENTANGLEMENT OF CARBON NANOTUBE BUNDLES - Bundled carbon nanotubes are disentangled and dispersed using the principles of extreme pressure reduction of fluids carrying the bundled nanotubes. They are added to a high pressure fluid upstream of a chamber operated at much lower pressure. These high-low pressure ratios are preferably at least 100:1. As the high pressure fluid enters the lower pressure chamber it violently expands causing separation and disentanglement of the bundled carbon fibers. To further assist in this disentanglement a nozzle may be used at the inlet to the lower pressure chamber to direct the high pressure fluid against a hardened anvil in the chamber. This impact further aids disentanglement. Coating the nanotubes with a dispersant also improves disentanglement.07-29-2010
20100254887Carbon Fibers Having Improved Strength and Modulus and an Associated Method and Apparatus for Preparing Same - The invention is directed to carbon fibers having high tensile strength and modulus of elasticity. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through an oxidation oven wherein the fiber is subjected to controlled stretching in an oxidizing atmosphere in which tension loads are distributed amongst a plurality of passes through the oxidation oven, which permits higher cumulative stretches to be achieved. The method also includes subjecting the fiber to controlled stretching in two or more of the passes that is sufficient to cause the fiber to undergo one or more transitions in each of the two or more passes. The invention is also directed to an oxidation oven having a plurality of cooperating drive rolls in series that can be driven independently of each other so that the amount of stretch applied to the oven in each of the plurality of passes can be independently controlled.10-07-2010
20130216469METHOD OF MANUFACTURING INFRARED SENSOR MATERIAL, INFRARED SENSOR MATERIAL, INFRARED SENSOR DEVICE AND INFRARED IMAGE SENSOR - A method of manufacturing an infrared sensor material includes preparing a CNT dispersion solution by dispersing a Carbon Nanotube (CNT) in a solvent, forming a CNT thin film using the CNT dispersion solution as a raw material, and annealing the CNT thin film so that an absolute value of the temperature coefficient of resistance is equal to or more than 1%/K at a temperature of −10° C. to 50° C.08-22-2013
20100221173METHOD FOR PREPARING SINGLE WALLED CARBON NANOTUBES FROM A METAL LAYER - Methods of preparing single walled carbon nanotubes are provided. An arrangement comprising one or more layers of fullerene in contact with one side of a metal layer and a solid carbon source in contact with the other side of metal layer is prepared. The fullerene/metal layer/solid carbon source arrangement is then heated to a temperature below where the fullerenes sublime. Single walled carbon nanotubes are grown on the fullerene side of the metal layer.09-02-2010
20120034150Method for Producing Solid Carbon by Reducing Carbon Oxides - A method for the production of various morphologies of solid carbon product by reducing carbon oxides with a reducing agent in the presence of a catalyst. The carbon oxides are typically either carbon monoxide or carbon dioxide. The reducing agent is typically either a hydrocarbon gas or hydrogen. The desired morphology of the solid carbon product may be controlled by the specific catalysts, reaction conditions and optional additives used in the reduction reaction. The resulting solid carbon products have many commercial applications.02-09-2012
20090087372PROCESS FOR THE PREPARATION OF A CATALYST FOR THE PRODUCTION OF CARBON NANOTUBES - A process for the preparation of a catalyst for the production of carbon nanotubes, the use of the catalyst for the production of carbon nanotubes, and the carbon nanotubes obtained by this production process. The catalyst is prepared on the basis of at least two metals from the group: cobalt, manganese, iron, nickel and molybdenum from soluble precursor compounds by spray drying or spray granulation of the precursor compounds dissolved in a solvent, and subsequent calcination.04-02-2009
20080274036MICROSTRUCTURED CATALYSTS AND METHODS OF USE FOR PRODUCING CARBON NANOTUBES - Methods for producing microstructured catalytic substrates and microstructured catalytic substrates produced by the methods, and methods for growing single-walled carbon nanotubes on the microstructured catalytic substrates wherein the single-walled carbon nanotubes are preferably of a highly specific chirality.11-06-2008
20110110843NEAT CARBON NANOTUBE ARTICLES PROCESSED FROM SUPER ACID SOLUTIONS AND METHODS FOR PRODUCTION THEREOF - Articles comprising neat, aligned carbon nanotubes and methods for production thereof are disclosed. The articles and methods comprise extrusion of a super acid solution of carbon nanotubes followed by removal of the super acid solvent. The articles may be processed by wet-jet wet spinning, dry-jet wet spinning, and coagulant co-flow extrusion techniques.05-12-2011
20100124529Method of manufacturing carbon cylindrical structures and biopolymer detection device - A method of manufacturing carbon cylindrical structures, as represented by carbon nanotubes, by growing them on a substrate using a chemical vapor deposition (CVD) method, comprising the steps of implanting metal ions to the substrate surface and then growing the carbon cylindrical structures using the metal ions as a catalyst. A method of manufacturing carbon nanotubes comprising a step of using nano-carbon material as seed material for growing carbon nanotubes is also disclosed. A biopolymer detection device comprising vibration inducing part for inducing vibration, binding part capable of resonating with the vibration induced by the vibration inducing part and capable of binding or interacting with a target biopolymer, and detection part for detecting whether or not the binding part have bound or interacted with the target biopolymer, is also disclosed.05-20-2010
20110033365PROCESS AND APPARATUS FOR PRODUCING CARBONACEOUS FILM - This invention provides a process and apparatus for producing a carbonaceous film such as a DLC film using a solid raw material without the need to supply a high energy radiation such as a laser beam. The process comprises providing a solid organic material as a raw material, applying a discharge energy to the material to form plasma, and depositing the plasma onto a base material to form a carbonaceous film. This process is preferably carried out by using a film production apparatus (02-10-2011
20110033366REACTANT LIQUID SYSTEM FOR FACILITATING THE PRODUCTION OF CARBON NANOSTRUCTURES - A method includes isolating carbon atoms as carbide anions below a surface of a reactant liquid. The carbide anions are then enabled to escape from the reactant liquid to a collection area where carbon nanostructures may form. A carbon structure produced in this fashion includes at least one layer made up of hexagonally arranged carbon atoms. Each carbon atom has three covalent bonds to adjoining carbon atoms and one unbound pi electron.02-10-2011
20110243831CARBON FIBER PRECURSOR FIBER BUNDLE, PRODUCTION METHOD AND PRODUCTION DEVICE THEREFOR, AND CARBON FIBER AND PRODUCTION METHOD THEREFOR - A production method of a carbon fiber precursor fiber and/or a fiber bundle which permits easy bundling of a plurality of small tows into one bundle, with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality. A production method of carbon fiber precursor fiber and/or a fiber bundle that has a degree of intermingle of 1 m10-06-2011
20100047152GROWTH OF CARBON NANOTUBES USING METAL-FREE NANOPARTICLES - The present invention provides a method for forming at least one carbon nanotube (02-25-2010
20100061918PROCESS FOR PRODUCING SINGLE-WALLED CARBON NANOTUBES WITH INCREASED DIAMETER - There is provided a process for producing single-walled carbon nanotubes with an increased diameter, characterized in that it comprises a diameter-increasing treatment step of heating carbon nanotubes of a raw material at a degree of vacuum of 1.3×1003-11-2010
20120148474EMBEDDED NANOPARTICLE FILMS AND METHOD FOR THEIR FORMATION IN SELECTIVE AREAS ON A SURFACE - The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles.06-14-2012
20100310446Carbon and Electrospun Nanostructures - The present invention is directed to the production of nanostructures, e.g., single wall carbon nanotubes (“SWNT”) and/or multi wall carbon nanotubes (“MWNT”), from solutions containing a polymer, such as polyacrylonitrile (PAN). In particular, the invention is directed to the production of nanostructures, for example, SWNT and/or MWNT, from mixtures, e.g., solutions, containing polyacrylonitrile, polyaniline emeraldine base (PANi) or a salt thereof, an iron salt, e.g., iron chloride, and a solvent. In one embodiment, a mixture containing polyacrylonitrile, polyaniline emeraldine base or a salt thereof, an iron salt, e.g., iron chloride, and a solvent is formed and the mixture is electrospun to form nanofibers. In another embodiment, the electrospun nanofibers are then oxidized, e.g., heated in air, and subsequently pyrolyzed to form carbon nanostructures.12-09-2010
20080247938Process of growing carbon nanotubes directly on carbon fiber - A process for growing a carbon nanotube directly on a carbon fiber includes at least the steps of depositing a metallic film of at least 1 nm in thickness on at least one surface of a flake-shaped carbon-fiber substrate; placing the substrate into a reactor; introducing a gas including carbon-containing substances into the reactor as a carbon source needed for growing a plurality of carbon nanotubes (CNTs); and thermally cracking the carbon-containing substances in the gas to grow the carbon nanotubes directly on the substrate.10-09-2008
20080279754Induced electrical property changes in single walled carbon nanotubes by electromagnetic radiation - In the apparatus and process of the present invention, it is possible to fabricate CNTs with specific diameters and morphologies. The morphology selection can yield samples of pre-selected diameter configurations making it possible to take a sample of SWNTs produced by any synthesis technique and induce a morphology change that causes the sample to be either all conductive, all narrow band gap semiconductive or wide band gap semiconductive, within a given nanotube rope.11-13-2008
20080279753Method and Apparatus for Growth of High Quality Carbon Single-Walled Nanotubes - Method and processes for synthesizing single-wall carbon nanotubes is provided. A carbon precursor gas is contacted with metal catalysts deposited on a support material. The metal catalysts are preferably nanoparticles having diameters less than about 50 nm. The reaction temperature is selected such that it is near the eutectic point of the mixture of metal catalyst particles and carbon.11-13-2008
20110020211High Throughput Carbon Nanotube Growth System, and Carbon Nanotubes and Carbon Nanofibers Formed Thereby - A system is provided for forming carbon nanotubes comprising growing carbon nanotubes using a hot filament CVD system.01-27-2011
20100284896Increasing the specific strength of spun carbon nanotube fibers - A spun fiber of carbon nanotubes is exposed to ion irradiation. The irradiation exposure increases the specific strength of the spun fiber.11-11-2010
20100158788Supported Catalyst with Solid Sphere Structure, Method for Preparing the Same and Carbon Nanotubes Prepared Using the Same - A supported catalyst with a solid sphere structure of the present invention includes an oxide supporting body and a metal such as Ni, Co, Fe, or a combination thereof distributed on the surface and inside of the supporting body. The supported catalyst with a solid sphere structure can maintain a spherical shape during heat treatment and can be used with a floating bed reactor due to the solid sphere structure thereof.06-24-2010
20100196250CONTINUOUS METHOD FOR OBTAINING COMPOSITE FIBRES CONTAINING COLLOIDAL PARTICLES AND RESULTING FIBRE - The invention relates to a method for obtaining composite fibers, that comprises dispersing colloidal particles in a solvent, injecting the dispersion into a co-flow of a polymer coagulation solution for forming a pre-fiber, circulating the pre-fiber in a duct, extracting, optionally washing and drying the pre-fiber in order to obtain a fiber, and winding the fiber thus obtained, characterized in that the minimum retention time of the fiber within the duct is adjusted so that it has a mechanical strength sufficient to be extracted from the duct, and in that its extraction is vertical and continuous. The invention also relates to composite fibers that can be made according to said method.08-05-2010
20100196249Aligned carbon nanotube bulk aggregate, process for producing the same and uses thereof - An aligned carbon nanotube bulk structure capable of attaining high density and high hardness not found so far. The aligned carbon nanotube bulk structure has a plurality of carbon nanotubes (CNTs) applied with a density-increasing treatment, and having alignment in a predetermined direction, the structure has a degree of anisotropy of 1:3 or more between the direction of alignment and the direction vertical to the direction of alignment, and the intensity by irradiating X-rays along the direction of alignment is higher than the intensity by irradiating X-rays from the direction vertical to the direction of alignment at a (002) peak in X-ray diffraction data, and the degree of alignment thereof satisfies predetermined conditions.08-05-2010
20100068124NANOSTRUCTURE DEVICES AND FABRICATION METHOD - An ion flux is directed to a carbon nanotube to permanently shape, straighten and/or bend the carbon nanotube into a desired configuration. Such carbon nanotubes have many properties that make them ideal as probes for Scanning Probe Microscopy and many other applications.03-18-2010
20090202422METHOD FOR TREATING CARBON NANOTUBES, CARBON NANOTUBES AND CARBON NANOTUBE DEVICE - A method for treating carbon nanotubes is proved, which comprises treating the carbon nanotubes with an aqueous solution containing hydroxyl radicals (HO.).08-13-2009
20100028247METHODS FOR SELECTIVE FUNCTIONALIZATION AND SEPARATION OF CARBON NANOTUBES - The present invention is directed toward methods of selectively functionalizing carbon nanotubes of a specific type or range of types, based on their electronic properties, using diazonium chemistry. The present invention is also directed toward methods of separating carbon nanotubes into populations of specific types or range(s) of types via selective functionalization and electrophoresis, and also to the novel compositions generated by such separations.02-04-2010
20120308471SELECTIVE ETCHING OF SINGLE WALLED CARBON NANOTUBES - Described is a method for the selective etching of single walled carbon nanotubes with CO12-06-2012
20100021367FACILE PURIFICATION OF CARBON NANOTUBES WITH LIQUID BROMINE AT ROOM TEMPERATURE - A method of removing metal impurities from carbon nanotubes includes treating carbon nanotubes with distilled bromine in a substantially oxygen- and water-free atmosphere and then removing the distilled bromine from the carbon nanotubes. Purified carbon nanotubes having an iron content from about 2.5 to about 3.5 by weight that are substantially free of derivatization at the ends and defect sites are made available via this method.01-28-2010
20100254886Carbon Nanotube Particulates, Compositions and Use Thereof - A method for making carbon nanotube particulates involves providing a catalyst comprising catalytic metals, such as iron and molybdenum or metals from Group VIB or Group VIIIB elements, on a support material, such as magnesia, and contacting the catalyst with a gaseous carbon-containing feedstock, such as methane, at a sufficient temperature and for a sufficient contact time to make small-diameter carbon nanotubes having one or more walls and outer wall diameters of less than about 3 nm. Removal of the support material from the carbon nanotubes yields particulates of enmeshed carbon nanotubes that retain an approximate three-dimensional shape and size of the particulate support that was removed. The carbon nanotube particulates can comprise ropes of carbon nanotubes. The carbon nanotube particulates disperse well in polymers and show high conductivity in polymers at low loadings. As electrical emitters, the carbon nanotube particulates exhibit very low “turn on” emission field.10-07-2010
20090220409CONTINUOUS PROCESS FOR THE PRODUCTION OF CARBON NANOFIBER REINFORCED CONTINUOUS FIBER PREFORMS AND COMPOSITES MADE THEREFROM - This invention provides a continuous process for the growth of vapor grown carbon fiber (VGCNT) reinforced continuous fiber preforms for the manufacture of articles with useful mechanical, electrical, and thermal characteristics. Continuous fiber preforms are treated with a catalyst or catalyst precursor and processed to yield VGCNT produced in situ resulting in a highly entangled mass of VGCNT infused with the continuous fiber preform. The continuous process disclosed herein provides denser and more uniform carbon nanotubes and provides the opportunity to fine-tune the variables both within an individual preform and between different preforms depending on the characteristics of the carbon nanotubes desired. The resulting continuous fiber preforms are essentially endless and are high in volume fraction of VGCNT and exhibit high surface area useful for many applications. The invention also provides for composites made from the preforms.09-03-2009
20110064645CARBON NANOTUBE AND METHOD FOR PRODUCING THE SAME - The present invention provides a method for producing carbon nanotubes comprising (a) providing a substrate; (b) coating a catalyst layer on said substrate; (e) heating the substrate from step (b); (d) continuously supplying a carbon source to grow carbon nanotubes; (e) interrupting the supplement of the carbon source and supplying an oxidizing gas; and (f) resupplying the carbon source to make the carbon nanotubes obtained from step (d) to re-grow at a higher growth rate. The present invention also provides carbon nanotubes fabricated by the above-mentioned method. The carbon nanotubes have extremely excellent field emission properties.03-17-2011
20110318255CARBON NANOTUBE STRUCTURE - A carbon nanotube structure includes a number of carbon wires and a number of second carbon nanotubes. Each of the carbon nanotube wires includes a number of first carbon nanotubes joined end to end by the carbon-carbon bonds therebetween. The carbon wires and the carbon nanotubes are joined by van der Waals attractive force therebetween.12-29-2011
20100239490Processes for growing carbon nanotubes using disordered carbon target - Processes for producing single-wall carbon nanotubes without catalysts are provided. The nanotubes are produced by vaporizing silicon carbide and carbon.09-23-2010
20100068123Carbon nano-fibre production - This invention provides a reactor for carbon nano-fibre production comprising a generally horizontal elongate cylindrical reaction vessel arranged to rotate about its cylindrical axis and containing in use a particulate catalyst-containing reaction bed, said reaction vessel having a gas inlet port and a gas outlet port positioned such that one of said inlet and outlet ports is in said bed and the other is outside said bed.03-18-2010
20100021368Catalytic etching of carbon fibers - The present invention relates to a method for etching carbon fibers, in particular carbon nanofibers and to the carbon nanofibres obtainable by this method, and the use thereof.01-28-2010
20100278716DISPERSION CONTAINING FLAME-RESISTANT POLYMER, FLAME-RESISTANT FIBER, AND CARBON FIBER - A dispersion contains a flame-resistant polymer, which can improve shaping stability of the flame-resistant polymer during ejection from a die orifice, and physical stability of a shaped product in a washing step. The dispersion containing a flame-resistant polymer is a dispersion in which a flame-resistant polymer is dispersed in an organic solvent, an in-water tensile strength thereof per unit cross-sectional area is 1.0 MPa or more and 6.5 MPa or less, the flame-resistant polymer can be preferably obtained by heat-treating an acrylonitrile polymer in the presence of at least one kind of acid, acid anhydride or acid chloride in an organic solvent, and a suitable organic solvent is a polar organic solvent.11-04-2010
20120082613Method for Production of Carbon Nanotube and Method for Purification of the Same - The present invention provides a method for producing a carbon nanotube having a high purity and a method for purifying an unpurified carbon nanotube or a carbon nanotube having a low purity. The method for producing a carbon nanotube comprises a step of providing a carbonaceous material containing a carbon nanotube and a step of adding an iron material and hydrogen peroxide to the carbonaceous material to thereby purity a carbon nanotube. It is preferred that an iron powder is used as the iron material. The iron powder is preferably used in a proportion of 0.5 to 20 parts by mass relative to 100 parts by mass of the whole carbonaceous material.04-05-2012
20090016951DEVICE STRUCTURE OF CARBON FIBERS AND MANUFACTURING METHOD THEREOF - An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end.01-15-2009
20110038786Separation of Carbon Nanotubes in Density Gradients - The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.02-17-2011
20110038788CARBON-FIBER PRECURSOR FIBER, CARBON FIBER, AND PROCESSES FOR PRODUCING THESE - A carbon fiber precursor fiber having a weight average molecular weight M02-17-2011
20110038787PARTITION AND TRANSPORTATION OF ENCAPSULATED ATOMS - A system includes a carbon nanotube and a torsion device. The torsion device is coupled to the carbon nanotube. The torsion device is configured to apply torsion to the carbon nanotube.02-17-2011
20090022652Process for Producing Carbon Nanotube and Catalyst for Carbon Nanotube Production - Provided is a method for producing a carbon nanotube, wherein a catalyst for carbon nanotube production comprising a powdery catalyst supporting a metal on magnesia and having a bulk density of 0.30 g/mL to 0.70 g/mL, in a vertical reactor, is disposed over the whole area in a horizontal cross section direction of the reactor, in such state a carbon-containing compound flowed in a vertical direction inside the reactor is contacted with the catalyst at 500 to 1200° C., thereby carbon nanotubes of uniformity and high quality are efficiently synthesized in a large amount.01-22-2009
20080292530CALCINATION OF CARBON NANOTUBE COMPOSITIONS - A carbon nanotube composition and method of making the same. The composition is made by: heating a precursor composition under a non-oxidizing or reducing atmosphere to form a carbon composition of carbon nanotubes and amorphous carbon; and calcining the carbon composition in the presence of oxygen to oxidize and vaporize the amorphous carbon without oxidizing the carbon nanotubes. The precursor composition includes a mixture or complex of a transition metal compound and an organic compound that chars at elevated temperatures.11-27-2008
20100247420Pretreatment Method for the Synthesis of Carbon Nanotubes and Carbon Nanostructures from Coal and Carbon Chars - Carbon nanostructures such as multiwalled carbon nanotubes are formed from electrolyzed coal char. The electrolyzed coal char is formed by forming a slurry of coal particles, metal catalyst and water and subjecting this to electrolysis, which generates carbon dioxide and hydrogen. This forms a coating on the particles which includes metal catalysts. These particles can be used as is for formation of multi-walled carbon nanotubes using a pyrolysis method or other method without the addition of any catalyst. The gelatinous coating can be separated from the char and used as a fuel or as a carbon source to form carbon nanostructures.09-30-2010
20100247419SOLID PHASE SYNTHESIZED CARBON NANO FIBER AND TUBE - A carbon nano tube characterized by Bragg diffraction pattern peaks appearing at 2 theta (2θ)=26.5°, 44.5°, 51.8°. A carbon nano fiber is disclosed and characterized by Bragg diffraction pattern peaks appearing 2 theta (2θ)=44.5°, 51.8°. These carbon nano materials can be prepared in a solid phase by combustion and heating of the solid raw materials both with and without a tube control agent. The carbon nano tube growth process can include controlling the length of the tubes.09-30-2010
20110158895HIGH MODULE CARBON FIBER AND METHOD FOR FABRICATING THE SAME - The invention provides a high module carbon fiber and a fabrication method thereof. The high module carbon fiber includes the product fabricated by the following steps: subjecting a pre-oxidized carbon fiber to a microwave assisted graphitization process, wherein the pre-oxidized carbon fiber is heated to a graphitization temperature of 1000-3000° C. for 1-30 min. Further, the high module carbon fiber has a tensile strength of between 2.0-6.5 GPa and a module of between 200-650 GPa.06-30-2011
20100233067METHOD OF PRODUCING CUP-SHAPED NANOCARBON AND CUP-SHAPED NANOCARBON - A method of producing of the present invention is a method of producing a cup-shaped nanocarbon formed of graphene sheets. A nanocarbon molecule has a cup shape, a bottom surface and an upper surface thereof being opened. The method of producing of the present invention includes the following processes (A) and (B). 09-16-2010
20130171054Supported Catalyst for Synthesizing Multi-Wall Carbon Nanotubes and Method for Preparing the Same - A supported catalyst for synthesizing multi-walled carbon nanotubes includes a supporting body and a metal catalyst including Fe, Co, and Mn in a mole ratio according to Equation (1):07-04-2013
20110274612LIGNIN DERIVATIVE, SHAPED BODY COMPRISING THE DERIVATIVE AND CARBON FIBERS PRODUCED FROM THE SHAPED BODY - A lignin derivative is produced from a lignin with the empirical formula L(OH)11-10-2011
20130101495SYSTEMS AND METHODS FOR CONTINUOUSLY PRODUCING CARBON NANOSTRUCTURES ON REUSABLE SUBSTRATES - A system includes a reusable substrate upon which a carbon nanostructure is formed as a carbon nanostructure-laden reusable substrate, a first conveyor system adapted to continuously convey the reusuable substrate through a carbon nanotube catalyst application station and carbon nanostructure growth station, and a second conveyor system adapted to create an interface between a second substrate and the carbon nanostructure-laden reusuable substrate, the interface facilitating transfer of a carbon nanostructure from the carbon nanostructure-laden reusuable substrate to the second substrate. A method includes growing a carbon nanostructure on a reusable substrate, the carbon nanostructure includes a carbon nanotube polymer having a structural morphology comprising interdigitation, branching, crosslinking, and shared walls and transferring the carbon nanostructure to a second substrate to provide a carbon nanostructure-laden second substrate. The method is adapted for continuous carbon nanostructure production on the reusable substrate. A pre-preg includes such a carbon nanostructure.04-25-2013
20130101494Hydrophilic Silicone Copolymers Useful In Carbon Fiber Production - Robust oiling agent compositions for use in preparing carbon fibers from acrylic polymer carbon fiber precursors contain at least one silicone copolymer minimally containing an organopolysiloxane moiety, a polyoxyalkylene polyether moiety, and at least one internal or terminal urea or urethane group.04-25-2013
20090053129EMBEDDED NANOPARTICLE FILMS AND METHOD FOR THEIR FORMATION IN SELECTIVE AREAS ON A SURFACE - The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles.02-26-2009
20130156679METHOD AND APPARATUS FOR FORMING NANOPARTICLES - A first layer of a catalyst material is formed on a substrate and heat treated to form a first plurality of nanoparticles. A second layer of a catalyst material is then formed over the substrate and the first plurality of nanoparticles and heat treated to form a second plurality of nanoparticles. The first layer of nanoparticles is advantageously not affected by the deposition or heat treatment of the second layer of catalyst material, for example being pinned or immobilised, optionally by oxidation, before formation of the second layer.06-20-2013
20110311430PROCESS FOR PRODUCTION OF PRECURSOR FIBER FOR PREPARING CARBON FIBER HAVING HIGH STRENGTH AND HIGH ELASTIC MODULUS - The present invention provides a process for producing a precursor fiber which can provide a carbon fiber having high strength and high elastic modulus. The process of the present invention comprises a step where an aqueous solution of amphoteric molecule is prepared; a step where carbon nanotube is added to the aqueous solution of the amphoteric molecule so that the carbon nanotube is dispersed therein to prepare a dispersion of carbon nanotube; a step where the carbon nanotube dispersion is mixed with a polyacrylonitrile polymer and rhodanate or zinc chloride to prepare a spinning dope; a step where a coagulated yarn is prepared from the spinning dope by a wet or dry-wet spinning method; and a step where the coagulated yarn is drawn to give a precursor fiber for carbon fiber.12-22-2011
20120093710PURIFIED CARBON NANOTUBES - Provided is a continuous method and apparatus of purifying carbon nanotubes. The continuous method and apparatus of purifying carbon nanotubes is characterized in a first purifying step for injecting a carbon nanotube liquid mixture containing an oxidizer into a purifying reactor under a sub-critical water or supercritical water condition at a pressure of 50 to 400 atm and a temperature of 100 to 600° C. to obtain a purified product, thereby removing amorphous carbon and producing the carbon nanotube product.04-19-2012

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